Add'em card game - 1940s

Fabulous original ADD’EM, the game that counts! From the 1940s printed in England by Mansell’s London. Basically an unusual way to learn maths using number cards and operations, (+,-, etc), to complete sums.

Back of the cards shows an owl teaching mathematics to baby owls.

The game comes in a delightful but very worn cardboard box with all cards in tact in good condition with the instruction booklet included. Looks to predate the other copy we have on hand. Grade 3 under the Hoyles Vintage Grading System.